Camsyn ecc35456d7 [Utils] Fix incorrect LCSSA PHI nodes when splitting critical edges with MergeIdenticalEdges (#131744) ...

This PR fixes incorrect LCSSA PHI node generation when splitting
critical edges with both
`PreserveLCSSA` and `MergeIdenticalEdges` enabled. The bug caused PHI
nodes in the split block
to miss predecessors when multiple identical edges were merged.

2025-04-03 12:02:03 +02:00

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